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Finding the Fourth Proportional to 891.68, 1,337.34 and 404.61

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Solution

The fourth proportional to 891.68, 1,337.34 and 404.61 is: 606.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.68 : 1,337.34 = 404.61 : x
  2. Step 2: Convert to fraction form
    891.68/1,337.34 = 404.61/x
  3. Step 3: Cross multiply
    891.68x = 1,337.34 × 404.61
  4. Step 4: Simplify right side
    891.68x = 541,101.14
  5. Step 5: Solve for x
    x = 541,101.14/891.68
  6. Step 6: Final answer
    x = 606.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.